440P/Kobayashi is a periodic comet in the Solar System, discovered by the Japanese amateur astronomer Takao Kobayashi on January 30, 1997. It was the first comet to be discovered by an amateur astronomer with the use of CCD.
 | |
| Discovery | |
|---|---|
| Discovered by | Takao Kobayashi |
| Discovery date | January 30, 1997 |
| Orbital characteristics[1] | |
| Epoch | 2450520.5 (March 13, 1997) |
| Aphelion | 15.121 AU |
| Perihelion | 2.055 AU |
| Semi-major axis | 8.588 AU |
| Eccentricity | 0.761 |
| Orbital period | 25.17 a |
| Inclination | 12.36° |
| Last perihelion | March 2, 1997 |
| Next perihelion | March 25, 2022 |
On January 30 and January 31, 1997, Takao Kobayashi observed an object, P/1997 B1 (Kobayashi), which was initially thought to be a minor planet and was reported to the IAU as such by S. Nakano. Over the next few days, the object was observed to be in a cometary orbit. W. Offutt later showed it to be a comet.[2] For discovery of a comet with CCD, as well as the faintest discovery, Kobayashi ranks the first among amateur astronomers. It demonstrates that amateur astronomers still have an important role to play in the field of astronomical object discovery.[3]
The comet was recovered on January 11, 2022, by the Purple Mountain Observatory. The comet was also spotted in images by Kitt Peak-Bok from November 29, 2021, and Pan STARRS from November 2021 and January 2022. In the latter the comet exhibited a very condensed coma and a tail measuring two arcseconds in length. It acquired the provisional designation P/2021 W2.[4] Its last observation used was on February 22, 2022.
See also
editReferences
edit- ^ "P/1997 B1 (Kobayashi) Orbit". Minor Planet Center. Retrieved 2016-02-18.
- ^ "THE ASTRONOMER Electronic Circular No 1171". THE ASTRONOMER. Retrieved 2009-12-22.
- ^ "Current comets". Jonathan Shanklin. Retrieved 2009-12-22.
- ^ "MPEC 2022-A164 : COMET P/1997 B1 = P/2021 W2 (Kobayashi)". minorplanetcenter.net. 11 January 2022. Retrieved 29 January 2022.
External links
edit- "IAUC 6553: P/1997 B1". IAU: Central Bureau for Astronomical Telegrams. Central Bureau for Astronomical Telegrams. Retrieved 2016-01-17.
- "IAUC 6554: P/1997 B1; 1997X". IAU: Central Bureau for Astronomical Telegrams. Central Bureau for Astronomical Telegrams. Retrieved 2016-01-17.
- "P/1997 B1 (Kobayashi)". JPL Small-Body Database Browser. Jet Propulsion Laboratory, California Institute of Technology. Retrieved 2016-01-17.
- "P/1997 B1 (Kobayashi)". Kazuo Kinoshita. Retrieved 2016-01-17.
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